2015/05/21 by Stefano Bolognesi, Bolognesi, Stefano, Simone Giacomelli +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Quantum Chromodynamics and Particle Interactions #Cosmology and Gravitation Theories
paper · pdf · doi:10.48550/arxiv.1505.05801
We revisit the study of singular points in the Coulomb branch of N=2 SQCD in four dimensions with gauge group SU(N) and odd number of flavors. For certain choices of the mass parameters these vacua are not lifted by a mass term for the chiral multiplet in the adjoint representation. By using recent results about the M5 brane description of N=1 theories we study the resulting vacua and argue that the low-energy effective theory has a simple Lagrangian description involving a free chiral multiplet in the adjoint representation of the flavor symmetry group, a system somewhat reminiscent of the standard low-energy pion description of the real-world QCD. This fact is quite remarkable in view of the fact that the underlying N=2 SCFT (the Argyres-Douglas systems) are strongly-coupled non-local theories of quarks and monopoles.